Abstract: A method and a correspondingly configured tomography scanner are disclosed for normalizing image data with respect to a contrast in the image data produced by a contrast agent, the image data illustrating a tissue structure to be examined and at least part of a blood vessel system of an examination region connected to the tissue structure, which are at least in part permeated by the contrast agent. In an embodiment of the method, image data of the examination region is provided with the aid of the tomography scanner. At least one section of a reference vessel permeated by contrast agent is selected in the image data. The image data is normalized on the basis of image data from the section of the reference vessel such that the contrast in the image data as a result of the contrast agent is almost independent of patient-specific and examination-specific parameters in order to ensure that image data from different times can be compared.

Abstract: A detecting apparatus is disclosed for detecting an object by way of a projection through the object onto a detection plane. In at least one embodiment, the detecting apparatus has a transmitter that is designed to emit quanta. In at least one embodiment the detection apparatus also has a detector, arranged in a detection plane, for detecting the emitted quanta, the detector being designed and arranged to generate at least one detector signal at least partially representing the object in a projection, as a function of the quanta received through the object. In at least one embodiment, the detecting apparatus is designed to generate as a function of the generated detector signal for a detected quantum a quantum signal that represents the quantum energy of one detected quantum. Finally, in at least one embodiment the detecting apparatus is designed to generate a sum signal that corresponds to a sum of the quantum energies of the quantum energies represented by the quantum signals.

Abstract: In a method to support the diagnosis and/or therapy of a pathological change of a blood vessel of a patient, in particular in the context of coronary heart disease at a first point in time of a pixel-based or voxel-based first image is acquired with the blood vessel of interest by an imaging method, a determination is made from the first image of a quantity of existing non-calcified plaque and a quantity of existing calcium-rich plaque, a determination of a first indicator value is made from the quantities of the different plaque types that represents a measurement of the quantity and the composition of plaque present in the blood vessel at the first point in time, a comparison of the first indicator value is made with at least one limit value stored in a storage of a data processing device, and dependent on the comparison, a presentation is made on an output unit associated with the electronic data processing device of either a proposal for a measure to be undertaken on the patient, or a proposal for no meas

Abstract: A method is disclosed for recording a topogram data record for producing a topogram using an X-ray computer tomograph. To improve the image quality of the topogram, it is proposed that the topogram data record be recorded using a spring focus parallel and/or in azimuth with respect to a system axis of the X-ray computer tomograph.

Abstract: A method, a computational unit and a CT system are disclosed for improving the quality of CT image series. In at least one embodiment, the method includes scanning an examination object over a period of time which permits the acquisition of at least two temporally offset projection data records of an identical recording region; generating at least two temporally offset tomographic image data records, each having a multiplicity of pixels, by reconstructing the projection data records; transforming the image data records into transformation data records of at least two spatial frequency ranges; calculating temporal fitted values of the transformation data records for some of the spatial frequency ranges, and replacing the values of the transformation data records which were fitted by the calculated fitted values; performing an inverse transform of the transformation data records with the fitted values to form new image data records; and displaying the new image data records.

Abstract: At least one embodiment of the present invention relates to a CT scanner and/or a method for helical scanning of an examination object which has at least one portion undergoing periodic motion.

Abstract: A method is for taking computed tomography scans with the aid of a CT unit and to a CT unit. An X-ray tube is moved in a circle or spiral about a z-axis in combination with a detector situated opposite and an object is scanned. The X-ray tube includes a jumping focus with two or more different jumping focal positions relative to the X-ray tube. Parallel data records are formed from the detector data obtained, and tomograms are reconstructed therefrom. When forming the parallel data records, account is taken of the different position of the respectively current jumping focus in relation to the X-ray tube (=jumping focal position) in the radial direction.

Abstract: A method is disclosed for the production of CT images via a CT spiral reconstruction of object for examination moving in partial areas in a cyclical manner and a CT device therefor. During scanning of the object to be examined, various rates of advancement are used, irrespective of whether the scanned area is at least partially cyclically displaced or is stationary.

Abstract: An x-ray system is disclosed including a selector for finding an optimum combination between the contrast medium and the energy spectrum of an x-radiation for a scan to optimize the noise-to-contrast ratio. A method for creating X-ray images is also provided. The x-ray images are created with the aid of contrast media by taking into account an optimal combination between the contrast medium and the energy spectrum of an X-radiation used for a scan. A method for the use of a lanthanide-containing complex to produce a contrast medium for optimizing the combination between the contrast medium and the radiation to obtain a maximum contrast-to-noise ratio in an X-ray image is also provided.

Abstract: A method is for recording and evaluating image data with the aid of a tomography machine. At least two recordings with different spectral distribution are made of an examination area of an object. Further, measured data obtained from the two recordings are evaluated such that additional information relating to the examination area and/or a specific representation of the image of the examination area are/is obtained from the different spectral distributions. The tomography machine includes at least two separate recording systems. Further, it is operated such that the two recording systems operate with a different spectral distribution. As such, the additional information and the specific representation of an image can be obtained in conjunction with a reduced scanning time.

Abstract: In a method and filter and computer product for adaptive filtering of projection data acquired by a medical diagnostic apparatus, raw data-based filtering of the acquired projection data is undertaken using a filter with a filter kernel having a constant filter width, and the filtered projection data are mixed with the acquired projection data with a fixing of the respective quantitative relationships of filtered projection data to acquired projection data ensuing dependent on respective subsets of the acquired projection data.

Abstract: A method and a CT system are disclosed for carrying out a cardio-CT examination of a patient. The patient first is scanned using a first X-ray spectrum by way of at least two X-ray tubes at a first relative position, until the measurement data has been gathered from a determined heart phase for parallel projections over a range of in total at least 180° of projection angles. The patient is then scanned, without changing the position of the gantry, at the first relative position by way of at least two X-ray tubes using at least one second X-ray spectrum, until the measurement data has been gathered from a determined heart phase for parallel projections over a range of at least 180° of projection angles, upon which the next relative position between the patient and the gantry is moved to.

Abstract: A method and a CT system are disclosed for determining movement and rest phases of a partial object that moves at times in an examination object during a CT examination. In at least one embodiment, at least two different radiation sources are used for the comparative measurement, and a first radiation source emits a first fan beam at a specific rotation angle at a first instant, the absorption of said beam being measured in beamwise fashion, a second radiation source emits a second fan beam, at the same rotation angle at a second, later instant, the absorption of the beam likewise being measured in beamwise fashion, and the relative movement or relative rest of the partial object between the first and second instants is deduced by comparing deviating absorption values of a multiplicity of spatially equivalent and equidirectional fan beams proceeding from the same angular position of the radiation sources.

Abstract: A method is disclosed for recording a topogram data record for producing a topogram using an X-ray computer tomograph. To improve the image quality of the topogram, it is proposed that the topogram data record be recorded using a spring focus parallel and/or in azimuth with respect to a system axis of the X-ray computer tomograph.

Abstract: A detecting apparatus is disclosed for detecting an object by way of a projection through the object onto a detection plane. In at least one embodiment, the detecting apparatus has a transmitter that is designed to emit quanta. In at least one embodiment the detection apparatus also has a detector, arranged in a detection plane, for detecting the emitted quanta, the detector being designed and arranged to generate at least one detector signal at least partially representing the object in a projection, as a function of the quanta received through the object. In at least one embodiment, the detecting apparatus is designed to generate as a function of the generated detector signal for a detected quantum a quantum signal that represents the quantum energy of one detected quantum. Finally, in at least one embodiment the detecting apparatus is designed to generate a sum signal that corresponds to a sum of the quantum energies of the quantum energies represented by the quantum signals.

Abstract: A computed tomography unit includes at least one X-ray tube, that scans an object in a fashion rotating in a circle or spiral about a z-axis, in combination with an oppositely situated detector having a multiplicity of detector rows. Each detector row includes an aperture ?z in the z-direction, having a multiplicity of detector elements. Between the X-ray tube and detector, a detector diaphragm is arranged that reduces the aperture ?z of the detector rows in the z-direction. The X-ray tube includes a focus, of variable location relative to the X-ray tube and which alternatingly assumes during scanning at least two different positions that have different z-coordinates relative to the X-ray tube R.

Abstract: A method is for taking tomograms of a patient's beating heart with the aid of a computed tomography unit. ECG signals of the beating heart are recorded. In order to reconstruct the cardiac tomograms, use is made of detector data that originate from a selected cycle area of the cardiac cycle. The cycle area from which the data for the reconstruction originate is selected automatically and individually per cycle, for at least one cardiac cycle, by use of pattern recognition.

Abstract: A method is disclosed for a multislice computer assisted tomograph, capable of carrying out a spiral scan of an object volume with a pitch p selected to be small enough that each slice of the object volume is multiply detected during the spiral scan. The method includes calculating, using measured data of two temporally consecutive at least one of revolutions and half revolutions, an image of the object volume from which a change inside the object volume between the two temporally consecutive at least one of revolutions and half revolutions is directly visible. An embodiment of the method can permit, for example, the detection and visualization of dynamic processes with an enhanced time resolution.

Abstract: A detector for x-ray computer tomography scanners, includes a number of adjacent detector lines extending in an x direction, whereby each detector line is formed from a multitude of adjacent scintillator elements. In order to increase the resolution in the z direction and to simplify the design of the detector, the surface of the scintillator elements are partially covered, which further serves to reduce the size of the aperture in the z direction.

Abstract: In a method for computed tomography and a computed tomography apparatus for scanning a subject with a conical ray beam emanating from a focus that detects a matrix-like detector array, the focus is moved relative to the subject on a spiral path around a system axis, and the detector array supplies output data corresponding to the incident radiation, and images having an inclined image plane are reconstructed from output data respectively supplied during the movement of the focus on a spiral segment, the image planes of these images are inclined by an inclination angle ? around a first axis intersecting the system axis at a right angle and also are inclined by a tilt angle ? with respect to the system axis around a second axis that intersects the first axis as well as the system axis at a right angle.